Door assembly and seat unit

ABSTRACT

A door assembly for a seat unit provided within a vehicle cabin, in particular an aircraft cabin, the door assembly comprising at least a fixed base structure, a door element movably mounted on the base structure and which is movable between a fully retracted position and at least one deployed position, and a door slide device provided between the base structure and the door element to movably support the door element on the base structure. Further, the door slide device comprises at least a slide carrier bracket fixed to the base structure or the door element, at least one slide unit which is coupled to the slide carrier bracket in a normal operation mode, and at least one separate auxiliary slide arrangement.

This nonprovisional application claims priority to U.S. ProvisionalApplication No. 62/947,907, which was filed on Dec. 13, 2019, and isherein incorporated by reference.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to a door assembly for a seat unitprovided within a vehicle cabin, in particular an aircraft cabin.Further, the present disclosure relates generally to a seat unit havingsuch a door assembly.

Description of the Background Art

Door assemblies for seat units within a vehicle cabin, such as cabins ofpassenger transportation vehicles, are provided to improve privacy forpassengers. For example, the door assemblies may provide a privacyscreen, a movable wall or a sliding door to divide a seat from a cabinaisle of the vehicle cabin.

SUMMARY OF THE INVENTION

The disclosed examples are described in detail below with reference tothe accompanying drawing figures listed below. The following summary isprovided to illustrate examples or implementations disclosed herein. Itis not meant, however, to limit all examples to any particularconfiguration or sequence of operations.

In an exemplary embodiment, provided herein is a door assembly for aseat unit provided within a vehicle cabin, in particular an aircraftcabin, the door assembly comprising at least a fixed base structure, adoor movably mounted on the base structure and which is movable betweena fully retracted position and at least one deployed position, and adoor slide device provided between the base structure and the door tomovably support the door on the base structure. Further, the door slidedevice comprises at least a slide carrier bracket fixed to the basestructure or the door, at least one slide unit which is coupled to theslide carrier bracket in a normal operation mode, and at least oneseparate auxiliary slide arrangement, wherein, for example, in case ofde-coupling of the slide unit from the slide carrier bracket via a forceexertion on the door, the door is movably supported on the separateauxiliary slide arrangement.

Further scope of applicability of the present invention will becomeapparent from the detailed description given hereinafter. However, itshould be understood that the detailed description and specificexamples, while indicating preferred embodiments of the invention, aregiven by way of illustration only, since various changes, combinations,and modifications within the spirit and scope of the invention willbecome apparent to those skilled in the art from this detaileddescription.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become more fully understood from thedetailed description given hereinbelow and the accompanying drawingswhich are given by way of illustration only, and thus, are not limitingof the present invention, and wherein:

FIGS. 1A and 1B show schematically in a side view and a top view, anembodiment of a passenger seating arrangement,

FIGS. 2A to 2D show schematically in perspective views, an embodiment ofa door assembly attached to a furniture structure of a seat unit,

FIGS. 3A to 3D show schematically in enlarged perspective views, anembodiment of a door assembly comprising a door slide device providing ade-coupling mechanism for a passenger escape path feature,

FIGS. 4A and 4B show schematically in a rear views, an embodiment of adoor assembly comprising a door slide device having an additionalseparate auxiliary slide arrangement for a passenger escape pathfeature,

FIG. 5 shows schematically in enlarged perspective view, an embodimentan additional separate auxiliary slide arrangement for a passengerescape path feature,

FIG. 6 shows schematically in perspective view an embodiment, of a doorassembly comprising a door slide device providing a de-couplingmechanism for a passenger escape path feature,

FIGS. 7A and 7B show schematically in enlarged perspective views, anembodiment of a door slide device of a door assembly providing ade-coupling mechanism for a passenger escape path feature,

FIGS. 8A to 8D show schematically in side views and corresponding planviews an embodiment of a door assembly comprising a door slide deviceproviding a de-coupling mechanism for a passenger escape path feature,

FIG. 9 shows schematically a flow chart of a method for de-coupling adoor assembly of a seat unit provided within a vehicle cabin,

FIG. 10 is a block diagram of an apparatus for which various aspects,and

FIG. 11 is a schematic perspective view of a particular flying apparatusin accordance with an example.

DETAILED DESCRIPTION

In the following detailed description of the embodiments, numerousspecific details are set forth in order to provide a more thoroughunderstanding of the one or more embodiments. However, it will beapparent to one of ordinary skill in the art that the one or moreembodiments may be practiced without these specific details. In otherinstances, well-known features have not been described in detail toavoid unnecessarily complicating the description.

Throughout the application, ordinal numbers (e.g., first, second, third,etc.) may be used as an adjective for an element (i.e., any noun in theapplication). The use of ordinal numbers is not to imply or create anyparticular ordering of the elements nor to limit any element to beingonly a single element unless expressly disclosed, such as by the use ofthe terms “before”, “after”, “single”, and other such terminology.Rather, the use of ordinal numbers is to distinguish between theelements. By way of an example, a first element is distinct from asecond element, and the first element may encompass more than oneelement and succeed (or precede) the second element in an ordering ofelements.

The term “about,” when used with respect to a physical property that maybe measured, refers to an engineering tolerance anticipated ordetermined by an engineer or manufacturing technician of ordinary skillin the art. The exact quantified degree of an engineering tolerancedepends on the product being produced and the technical property beingmeasured. For a non-limiting example, two angles may be “aboutcongruent” if the values of the two angles are within ten percent ofeach other. However, if an engineer determines that the engineeringtolerance for a particular product should be tighter, then “aboutcongruent” could be two angles having values that are within one percentof each other. Likewise, engineering tolerances could be loosened inother embodiments, such that “about congruent” angles have values withintwenty percent of each other. In any case, the ordinary artisan iscapable of assessing what is an acceptable engineering tolerance for aparticular product, and thus is capable of assessing how to determinethe variance of measurement contemplated by the term “about.” Similarly,the term, “plurality,” as used herein may also be referred to as a list,collection, or ensemble.

FIGS. 1A and 1B show schematically in a side view and a top view anembodiment of a passenger seating arrangement 100. The passenger seatingarrangement 100 is, for example, arranged within a vehicle cabin 200 ofan apparatus 1100 as shown in FIG. 10 . In the illustrated examples, thevehicle cabin 200 is an aircraft cabin. However any other passengertransportation vehicle or cabin is contemplated.

The passenger seating arrangement 100 comprises a plurality of seatunits 110 arranged within the vehicle cabin 200. For example, the seatunits 110 are arranged one behind another along a longitudinal extensiondirection of the vehicle cabin 200. Each seat unit 110 comprises atleast a seat 120 and a furniture structure 130. The furniture structure130 may comprise a console 140, partition and privacy walls 150, a traytable device 160, and not further shown several passenger utility andstorage devices or the like. The furniture structure 130 is arrangedsuch that furniture parts at least partially surround the seat 120.Further, the seat unit 110 comprises at least a door assembly 1000. Thedoor assembly 1000 may be attached to a furniture part of the furniturestructure 130. For example, in the illustrated embodiment, the doorassembly 1000 is mounted to a partition wall 150 of the seat unit 110.

The door assembly 1000 comprises at least a fixed base structure 2000which may be coupled to a furniture part and/or the seat 120 and/or acabin floor structure. For example, the base structure 2000 may be adoor carrier structure, a bracket or a wall 150, or any such suitablestructure for fixedly attaching an object. Further, the door assembly1000 comprises at least a door 3000 movably mounted on the basestructure 2000. The door 3000 is, for example, a panel, a shutter, ascreen or the like. The door 3000 is substantially square shaped from aside view. The door 3000 provided herein improves privacy for apassenger of a corresponding seat unit 110 within the cabin 200. Thedoor 3000 is movable between a fully retracted position P1 and at leastone deployed position P2. In the shown embodiment, the deployed positionP2 is a fully deployed position P2. It is to be understood that the door3000 can be moved into any position between the fully retracted positionP1 and the fully deployed position P2. For example, the door 3000 islockable by a crew member in its fully retracted position P1. When thedoor 3000 is unlocked, the door 3000 may remain latched in the fullyretracted position P1 until the door 3000 is deployed forward by apassenger of the seat unit 110. In the deployed position P2, the door3000 may remain unlatched.

The door 3000 is configured to at least partially close a passengeraccess 300 to the seat 120 providing more privacy to the correspondingpassenger. The door assembly 1000 is provided on side of a cabin aisle210. For example, in the fully retracted position P1 the door 3000 is ina stowed and opened state such that the passenger access 300 providesegress from or ingress to the seat unit 110. In the deployed position P2more privacy is provided to the passenger seated on the seat 120,wherein the seat 120 is at least partially covered from view.

FIGS. 2A to 2D show schematically in perspective views an embodiment ofthe door assembly 1000 attached to the furniture structure 130 of theseat unit 110, wherein each figure shows the door 3000 in a differentposition. In particular, FIG. 2A shows the door 3000 in in the fullyretracted position P1, FIG. 2B shows the door 3000 in a position movedforward of the fully retracted position P1 and FIG. 2C shows the door3000 in the fully deployed position P2. FIG. 2D shows the furniturestructure 130 partly transparent.

FIGS. 3A to 3D show schematically in enlarged perspective views anembodiment of the door assembly 1000 comprising a door slide device 4000providing a de-coupling mechanism 400 for a passenger escape pathfeature. Examples of the de-coupling mechanism 400 are best shown inFIGS. 3B to 3D, 4A and 4B, 7A and 7B and 8C. The door slide device 4000is provided on the base structure 2000 and the door 3000, in particularthe door slide device 4000 is configured as a slide connection device500, as best shown in FIGS. 2A to 2D, 3A, 5 and 8A and 8B, between thebase structure 2000 and the door 3000.

The door slide device 4000 comprises at least a slide support unit 6000fixed to the base structure 2000, in particular on a side facing thedoor 3000. The slide support unit 6000 comprises two separate tracks6001, 6001′ which are attached to the base structure 2000. Further, thedoor slide device 4000 comprises a slide carrier unit 7000 comprisingtwo slide units 7001, 7001′. Each slide unit 7001, 7001′ is guidedwithin a respective track 6001, 6001′. The slide carrier unit 7000 ismounted on the door 3000, in particular on a side facing the basestructure 2000. The two slide units 7001, 7001′ are slidable supportedon the base structure 2000 via the slide support unit 6000. The slidecarrier unit 7000 comprises at least a fixed slide carrier bracket 7002fixed on the door 3000, wherein both slide units 7001, 7001′ are eachseparately detachably mounted to the slide carrier bracket 7002. Bothslide units 7001, 7001′ are fixedly coupled to the slide carrier bracket7002 in a normal operation state of the door 3000. The slide units 7001,7001′ are configured identically in this example. Movement of the slideunits 7001, 7001′ along the slide support unit 6000 is executedsubstantially parallel to each other in the normal operation state ofthe door 3000. Each slide unit 7001, 7001′ is coupled to the slidecarrier bracket 7002 via a detachable joint mechanism 7003, 7003′.

In case of jamming one of the slide units 7001, 7001′, the exemplaryshown, jammed slide unit 7001′ de-couples from the slide carrier bracket7002, wherein the door 3000 is slidable supported on the other stillfunctional slide unit 7001. Particularly, the door slide device 4000provides a simple de-coupling mechanism 400. For example, when thejammed slide unit 7001′ is de-coupled from the slide carrier bracket7002, the door 3000 is slidable guided on the base structure 2000 viathe remaining functional slide unit 7001.

In particular, the jammed slide unit 7001′ remains in the jammedposition on the slide support unit 6000, in particular in thecorresponding track 6001′ after decoupling and even when the door 3000is moved from the deployed position P2 to the fully retracted positionP1. The jammed slide unit 7001′ is thereby not functional anymore. Eachdetachable joint mechanism 7003, 7003′ comprises a detachable detentelement 7004, 7004′ and a corresponding detent receiving element 7005,7005′ detachably retaining the detent element 7004, 7004′. For example,the detachable detent element 7004, 7004′ is a detent pin 7006, as bestshown in FIGS. 3C and 3D, and the detent receiving element 7005, 7005′is a detent hole 7007, recess, notch or the like, as best shown in FIG.3D, into which the detent element 7004, 7004′ is detachable inserted andretained in a normal operation state of the door 3000.

In the illustrated example, the detent pin 7006 is fixedly secured in anelongated hole 7008 formed on the corresponding slide unit 7001, 7001′.Each detent pin 7006 projects partially from the slide unit 7001, 7001′out of the elongated hole 7008. Each detent pin 7006 is secured in thecorresponding detent hole 7007 in the normal state as best shown in FIG.3C. The detent element 7004, 7004′ is arranged fixedly attached to theslide unit 7001, 7001′. The receiving element 7005, 7005′ is arrangedfixedly attached on the slide carrier bracket 7002 by means of ahousing. When the slide unit 7001′ de-couples from the slide carrierbracket 7002, the detent element 7004′ attached to the jammed slide unit7001′ is pulled out of its receiving element 7005′, leaving the door3000 still retained on the other slide unit 7001 and so as on the slidesupport unit 6000, in particular on the track 6001. For example, whenthe detent element 7004′ is pulled free, a passenger or a crew membercan simply continue to open the door 3000 with a normal operation forceuntil sufficient space for egress is achieved. For example, the detentpin 7006 of the slide unit 7001′ is being moved out of the correspondingdetent hole 7007 as best shown in FIG. 3D.

In particular, FIG. 3A shows the door assembly 1000 with some structurecovering elements 5000, such as cover plates or mechanism shrouds andFIG. 3B shows the door assembly 1000, for example in a normal operationstate of the door 3000, without the structure covering elements 5000 fora more detailed view of the door slide device 4000. FIGS. 3C and 3D,each shows a sequence of the de-coupling mechanism when one of the slideunits 7001, 7001′ is jammed, wherein in FIG. 3C the slide unit 7001′ isjammed or broken or has a malfunction and in FIG. 3D the slide unit7001′ is already de-coupled from the slide support unit 6000 enabling afurther movement of the door 3000.

In case of both slide units 7001, 7001′, the slide carrier bracket 7002and/or the slide support unit 6000, e.g. its tracks 6001, 6001′, are/isjammed or if there is only one slide unit 7001 or 7001′ provided by thedoor assembly 1000, the door slide device 4000 comprises an additionaland separate auxiliary slide arrangement 10 as seen in FIG. 5 in moredetail.

FIG. 4A shows a case in which both slide units 7001, 7001′ are jammed orbroken, in particular blocked in such manner that the door 3000 cannotbe further moved relative to the base structure 2000. The movement ofthe door 3000 is blocked in the deployed position P2. To de-couple bothslide units 7001, 7001′ a force exertion on the door 3000 higher than anormal operation force is required which can be exerted on the door 3000by pushing or pulling the door 3000 in a closing direction, which meanstowards the base structure 2000. In case of de-coupling of the slideunits 7001, 7001′ from the slide carrier bracket 7002 via the forceexertion on the door 3000, the door 3000 is movably supported on theseparate auxiliary slide arrangement 10. In the normal operation modethe separate auxiliary slide arrangement 10 does not provide anyspecific function to a sliding function of the door 3000 relative to thebase structure 2000.

FIG. 4B shows slide units 7001, 7001′ fully separated from the slidecarrier bracket 7002. To ensure that the door 3000 is restrained fromfalling into the cabin aisle CA, the separate auxiliary slidearrangement 10 is provided between the base structure 2000 and the door3000. In a de-coupled state of the slide units 7001, 7001′, the separateauxiliary slide arrangement 10 is configured to function as an auxiliaryslide mechanism which supports the door 3000 further on the basestructure 2000. The door 3000 will rely on the separate auxiliary slidearrangement 10 for supporting during an emergency escape event.

In the de-coupled state of the slide units 7001, 7001′ from the slidecarrier bracket 7002, the door 3000 is separated from the base structure2000 and shifts in a direction D towards a vehicle floor, wherein theseparate auxiliary slide arrangement 10 is configured to hold the door3000 relative to the base structure 2000 in a slidable manner. Anyinjuries or damages to passengers, crew members and vehicle furnitureare avoided when the door 3000 is hold relative to the base structure2000 even in case of fully de-coupling of a main slide mechanism. Theseparate auxiliary slide arrangement in particular in form of anauxiliary slide mechanism, is configured to support the door 3000slidable on the base structure 2000.

The separate auxiliary slide arrangement 10 is arranged below or abovethe pair of slide units 7001, 7001′. For example, the auxiliary slidearrangement 10 is arranged in an upper area 3001 of the door 3000 asexemplarily shown in FIGS. 4A and 4B. For example, the auxiliary slidearrangement 10 is arranged in an area above a centerline 3002 of thedoor 3000 as exemplarily shown in FIGS. 4A and 4B. Therefore, a shiftmovement of the door 3000 when the slide units 7001, 7001′ are fullyseparated from the slide carrier bracket 7002 is controlled in suchmanner that the door 3000 is prevented from swinging too far into thecabin aisle 210. For additional support in a lower area of the door3000, a lower guide 12 is provided in the lower area of the door 3000.The lower guide 12 is configured to support the door 3000 relative tothe auxiliary slide arrangement in a vertical direction. The lower guide12 may be mounted to the base structure 2000 and/or to the door 3000.The lower guide 12 may engage with a bottom edge 3003 of the door 3000,as exemplarily shown in FIGS. 4A and 4B, and keep the door 3000 in apredetermined height. The lower guide 12 comprises a step or flapprotruding from the base structure 2000 in a direction towards the door3000 and on which the bottom edge 3003 of the door 3000 is supported onwhen shifting towards the vehicle floor.

FIG. 5 shows the auxiliary slide arrangement 10 in an enlarged view. Theseparate auxiliary slide arrangement 10 comprises at least one guide bar10 a and a retaining element 10 b which is guided along the guide bar 10a. In particular, FIG. 5 shows the door assembly 1000 in a normaloperation mode. The shown slide unit 7001 is functionally guided withinthe track 6001. The guide bar 10 a is mounted to the base structure 2000and the retaining element 10 b is mounted to the door 3000. For example,each end of the guide bar 10 a is fixed to a bracket 12.

In the shown embodiment, the bracket 12 is arranged below the lowertrack 6001. The retaining element 10 b is fixed to a lateral side 3004of the door 3000. For example, the lateral side 3004 comprises afixation point 3005 to which one end 10 c of the retaining element 10 bis mounted to. The fixation point 3005 may be provided by a common notfurther shown fixation element such as a screw, a clip, a bolt or thelike. In the normal operation mode of the door 3000, the retainingelement 10 b is guided along the guide bar 10 a in a substantiallycontactless manner. Thereby, in the normal operation mode the retainingelement 10 b is noiselessly guided along the guide bar 10 a.

In a de-coupled state of the slide units 7001, 7001′ from the slidecarrier bracket 7002, the door 3000 shifts in a direction towards thevehicle floor (in the shown embodiment in a downward direction), whereinthe retaining element 10 b is configured to hold the door 3000 relativeto the base structure 2000 by coming into slidable engagement with theguide bar 10 a.

The guide bar 10 a is substantially tube shaped in the illustratedexample. The guide bare 10 a may be coated with a common dampingmaterial, such as synthetic material. The retaining element 10 bcomprises one end 10 c fixedly attached or detachably attached to thedoor 3000 and a second end 10 d which is substantially shaped as a hook,loop or ring corresponding to an outer shape of the guide bar 10 a. Theretaining element 10 b is configured as an auxiliary retention wire. Theretaining element 10 b is, for example, configured as a one-piecespring. Each end 10 c, 10 d may comprise a number of windings.

In this example, when the door 3000 shifts in the downward direction D,the retaining element 10 b is in retaining engagement with the guide bar10 a to retain the door 3000 slidable on the base structure 2000 and asclose as possible to the base structure 2000.

FIG. 6 shows schematically in perspective view an embodiment of a doorassembly 1000 comprising a door slide device 4000 providing ade-coupling mechanism 400 for a passenger escape path feature.

FIGS. 7A and 7B show schematically in enlarged perspective views anembodiment of a door slide device 4000 of the door assembly 1000 asshown in FIG. 6 providing a de-coupling mechanism 400 for a passengerescape path feature. The door slide device 4000 comprises a slidecarrier unit 8000 fixed to the base structure 2000, in particular on aside facing the door 3000. The slide carrier unit 8000 comprises a fixedslide carrier bracket 8001 fixed to the base structure 2000. Further,the slide carrier unit 8000 comprises a slide carrier member 8002detachably mounted to the slide carrier bracket 8001. The slide carriermember 8002 is immovably fixed to the slide carrier bracket 8001 in anormal operation state of the door 3000.

Moreover, the door slide device 4000 comprises a slide support unit 9000comprising two slide units 9001, 9002. In the shown embodiment, theslide unit 9001 is fixed to the door 3000, which is hidden in the shownFIGS. 7A and 7B, and the other slide unit 9002 is fixed to the basestructure 2000. Wherein movement of the door 3000 is achieved by theslide unit 9001 which is fixed to the door 3000 and is slidablesupported on the slide carrier member 8002 in a normal operation of thedoor 3000. In case of jamming of the slide unit 9001 fixed to the door3000, said jammed slide unit 9001 de-couples from the slide carrierbracket 8001 and the door 3000 is slidable supported on the slide unit9002 fixed to the base structure 2000. In particular, the slide carriermember 8002 de-couples from the slide carrier bracket 8001. The slideunit 9001 is configured as a track and the slide unit 9002 comprises atleast one rod-like guide. In the shown embodiment, the slide unit 9002comprises two rod-like guides.

The slide carrier member 8002 provides a sliding guide 8003 on which theslide unit 9001 on side of the door 3000 is slidable guided. In a normaloperation state of the door 3000, the slide unit 9001 which is fixed tothe door 3000 slides along the sliding guide 8003, in particular on theslide carrier member 8002. The slide carrier member 8002 is slidablesupported on the slide unit 9002 fixed to the base structure 2000 suchthat in case of jamming the slide unit 9001 on side of the door 3000,the slide carrier member 8002 de-couples from the slide carrier bracket8001 whereupon the slide carrier member 8002 is movable along the slideunit 9002 fixed to the base structure 2000. Either the sliding guide8003 is jammed in the slide unit 9001 on side of the door 3000 or theslide unit 9001 is damaged such that it is immovably stuck on thesliding guide 8003.

For example, the slide carrier member 8002 is detachably mounted to theslide carrier bracket 8001 via a detachable joint mechanism 8004. Thedetachable joint mechanism 8004 comprises at least a detachable detentelement 8005 and a corresponding detent receiving element 8006detachably retaining the detent element 8005. For example, thedetachable detent element 8005 is a detent ball and the detent receivingelement 8006 is a detent hole 7007, recess, notch or the like into whichthe detent element 8005 is detachable inserted and retained in a normalstate. The detent element 8005 is arranged fixedly attached on the slidecarrier bracket 8001 and the receiving element 8006 is arranged fixedlyattached on the slide carrier member 8002. A diameter of the slide unit9002, in particular of the rod-like guides, is lower than supportingpins 8007 provided on the slide carrier bracket 8001 which are arrangedenclosed in through holes 8.8 of the slide carrier member 8002 in anormal operation state of the door 3000. Thereby, jamming of the slideunit 9002 and/or the slide carrier unit 8000 is prevented. Further, thesupporting pins 8007 fits to bushes to provide a sliding fit so thatcorrosion is prevented.

FIGS. 8A to 8D show schematically in side views and corresponding planviews an embodiment of the door assembly 1000 as described in FIGS. 6 to7B. In particular, each figure shows a process sequence of thede-coupling mechanism 400 when the slide unit 9001 on side of the door3000 is jammed. To additionally support the shown door 3000 on the basestructure 2000, the door assembly 1000 comprises the separate auxiliaryslide arrangement 10 according to FIG. 5 .

FIG. 9 shows schematically a flow chart of a method of de-coupling adoor assembly of 1 a seat unit 110 provided within a vehicle cabin 200,wherein the method comprises at least two steps S1 and S2. For example,the door assembly 1000 comprises at least a fixed base structure 2000which may be coupled to a furniture part and/or the seat 120 and/or acabin floor structure. Further, the door assembly 1000 comprises atleast a door 3000 such as a panel movably mounted on the base structure2000. The door 3000 provided herein improves privacy for a passenger ofa corresponding seat unit 120 within the cabin 200. The door 3000 ismovable between a fully retracted position P1 and at least one deployedposition P2. The door assembly 1000 further comprises two slide units7001, 7001′ which are each separately detachably mounted to a slidecarrier bracket 7002 of the door assembly 1000, and a separate auxiliaryslide arrangement 10. A first step S1 refers to exerting a force higherthan a normal operation force on the door 3000 when positioned in thedeployed position P2; wherein the force is exerted on the door 3000 in aclosing direction until the slide units 7001, 7001′ are decoupled fromthe slide carrier bracket 7002. A second step S2 refers to moving thedoor 3000 from the deployed position P2 into the retracted position P1on the separate auxiliary slide arrangement 10, wherein the door 3000 issupported on the separate auxiliary slide arrangement 10.

With reference now to FIG. 10 , the apparatus 1100 is provided. As shownin FIG. 10 , an example of the apparatus 1100 is a flying apparatus1101, such as an aerospace vehicle, aircraft, air cargo, flying car,satellite, planetary probe, deep space probe, solar probe, and the like.As also shown in FIG. 10 , a further example of the apparatus 1100 is aground transportation apparatus 1102, such as an automobile, a truck,heavy equipment, construction equipment, a boat, a ship, a submarine,and the like. A further example of the apparatus 1100 shown in FIG. 10is a modular apparatus 1103 that comprises at least one or more of thefollowing modules: an air module, a payload module, and a ground module.The air module provides air lift or flying capability. The payloadmodule provides capability of transporting objects such as cargo or liveobjects (people, animals, etc.). The ground module provides thecapability of ground mobility. The disclosed solution herein is appliedto each of the modules separately or in groups such as air and payloadmodules, or payload and ground, etc. or all modules.

With reference now to FIG. 11 , a more specific diagram of the flyingapparatus 1101 is depicted in which an implementation of the disclosureis advantageously employed. In this example, the flying apparatus 1101is an aircraft produced by the apparatus manufacturing and servicemethod and includes an airframe 1202 with a plurality of systems 1204and an interior 1206. Examples of the plurality of systems 1204 includeone or more of a propulsion system 1208, an electrical system 1210, ahydraulic system 1212, and an environmental system 1214. However, othersystems are also candidates for inclusion. Although an aerospace exampleis shown, different advantageous examples are applied to otherindustries, such as the automotive industry, etc.

When introducing elements of aspects of the disclosure or theimplementations thereof, the articles “a,” “an,” “the,” and “said” areintended to mean that there are one or more of the elements. The terms“comprising,” “including,” and “having” are intended to be inclusive andmean that there could be additional elements other than the listedelements. The term “implementation” is intended to mean “an example of.”The phrase “one or more of the following: A, B, and C” means “at leastone of A and/or at least one of B and/or at least one of C.”

Having described aspects of the disclosure in detail, it will beapparent that modifications and variations are possible withoutdeparting from the scope of aspects of the disclosure as defined in theappended claims. As various changes could be made in the aboveconstructions, products, and methods without departing from the scope ofaspects of the disclosure, it is intended that all matter contained inthe above description and shown in the accompanying drawings shall beinterpreted as illustrative and not in a limiting sense.

Further, the disclosure comprises embodiments according to the followingclauses:

Clause 1. A door assembly for a seat unit provided within a vehiclecabin, the door assembly comprising at least:

-   -   a fixed base structure;    -   a door movably mounted on the base structure and movable between        a retracted position and at least one deployed position; and    -   a door slide device between the base structure and the door to        movably support the door on the base structure,    -   the door slide device comprising:    -   a slide carrier bracket fixed to the base structure or the door,    -   at least one slide unit which is coupled to the slide carrier        bracket, and    -   at least one auxiliary slide arrangement configured such that        the door is movably supported on the separate auxiliary slide        arrangement.

Clause 2. The door assembly according to clause 1, wherein the separateauxiliary slide arrangement is configured to hold the door relative tothe base structure in a slidable manner at least in case of de-couplingof the slide unit from the slide carrier bracket.

Clause 3. The door assembly according to clause 1 or 2, wherein the atleast one separate auxiliary slide arrangement is arranged below orabove the slide unit.

Clause 4. The door assembly according to any one of the precedingclauses, wherein the separate auxiliary slide arrangement comprises atleast one guide bar and a retaining element which is guided along theguide bar.

Clause 5. The door assembly according to clause 4, wherein the guide baris mounted to the base structure and the retaining element is mounted tothe door.

Clause 6. The door assembly according to clause 4 or 5, wherein theretaining element is mounted on a lateral side of the door.

Clause 7. The door assembly according to any one of the clauses 4 to 6,wherein in the normal operation mode of the door, the retaining elementis guided along the guide bar in a substantially contactless manner.

Clause 8. The door assembly according to any one of the clauses 4 to 7,wherein in a de-coupled state of the slide unit from the slide carrierbracket, the door shifts in a direction towards a vehicle floor, whereinthe retaining element is configured to hold the door relative to thebase structure by coming into slidable engagement with the guide bar.

Clause 9. The door assembly according to any one of the clauses 4 to 8,wherein the retaining element comprises one end mounted to the door anda second end which is substantially shaped as a hook, loop or ring.

Clause 10. The door assembly according to any one of the clauses 4 to 9,wherein the retaining element is configured as an auxiliary retentionwire.

Clause 11. The door assembly according to any one of the clauses 4 to10, wherein the guide bar is substantially tube shaped.

Clause 12. The door assembly according to any one of the precedingclauses, wherein the slide carrier bracket is fixed on the door and theslide unit is detachably fixed on the slide carrier bracket.

Clause 13. The door assembly according to any one of the precedingclauses, wherein the door slide device comprises a slide support unitfixed to the base structure.

Clause 14. The door assembly according to clause 13, wherein the slidesupport unit comprises at least one track and the slide unit is slidableguided on the track in the normal operation mode.

Clause 15. The door assembly according to any one of the precedingclauses, wherein the slide unit is coupled to the slide carrier bracketvia a detachable joint mechanism comprising a detachable detent elementand a corresponding detent receiving element detachably retaining thedetent element.

Clause 16. The door assembly according to clause 15, wherein the slideunit comprises an elongated hole for fixedly securing the detachabledetent element to the slide unit.

Clause 17. The door assembly according to clauses 15 or 16, wherein thedetent element is configured as a detent pin and the detent receivingelement is configured as a detent hole.

Clause 18. The door assembly according to clause 1, wherein both slideunits are de-coupled via a force exertion on the door higher than anormal operation force, wherein said force exertion is exerted on thedoor by pushing or pulling the door in a closing direction

Clause 19. A seat unit for a vehicle cabin, in particular an aircraftcabin, comprising at least a seat and a furniture structure at leastpartially surrounding the seat and a door assembly according to any oneof the preceding clauses 1 to 18.

Clause 20. A method for de-coupling a door assembly of a seat unitprovided within a vehicle cabin according to any one of the precedingclauses 1 to 18, comprising:

-   -   exerting a force higher than a normal operation force on the        door when positioned in the deployed position; wherein the force        is exerted on the door in a closing direction until the slide        unit is de-coupled from the slide carrier bracket; and    -   moving the door from the deployed position into the retracted        position on the separate auxiliary slide arrangement.

The invention being thus described, it will be obvious that the same maybe varied in many ways. Such variations are not to be regarded as adeparture from the spirit and scope of the invention, and all suchmodifications as would be obvious to one skilled in the art are to beincluded within the scope of the following claims.

1-20. (canceled)
 21. A door assembly for a seat unit provided within avehicle cabin, the door assembly comprising: a door movable between aretracted position and at least one deployed position; and a door slidedevice to movably support the door, the door slide device including: aslide carrier bracket coupled to the door, a slide carrier unit havingat least one slide unit coupled to the slide carrier bracket, and atleast one auxiliary slide arrangement to support the door when the dooris decoupled from the door slide device.
 22. The door assembly of claim23, wherein the door slide device comprises at least a slide supportunit having at least one track.
 23. The door assembly of claim 24,wherein the at least one slide unit is configured for movement withinthe at least one track.
 24. The door assembly of claim 25, wherein theat least one slide unit is configured to decouple from the slide carrierbracket in response to a jamming of the at least one slide unit in theat least one track.
 25. The door assembly of claim 26, furthercomprising a detachable joint mechanism to detachably mount the at leastone slide unit to the slide carrier bracket.
 26. The door assembly ofclaim 27, wherein the detachable joint mechanism comprises a detachabledetent element and a corresponding detent receiving element configuredto detachably retain the detachable detent element.
 27. The doorassembly of claim 28, wherein: the detachable detent element comprises adetent pin, and the detent receiving element comprises a detent holeinto which the detachable detent element is detachably retained in anormal operation state of the door.
 28. The door assembly of claim 23,wherein the at least one auxiliary slide arrangement comprises at leastone guide bar and a retaining element configured for movement along theguide bar.
 29. A vehicle cabin, comprising a seat unit; a door assemblyfor the seat unit, the door assembly including: a door movable between aretracted position and at least one deployed position; and a door slidedevice to movably support the door, the door slide device including: aslide carrier bracket coupled to the door, a slide carrier unit havingat least one slide unit coupled to the slide carrier bracket, and atleast one auxiliary slide arrangement to support the door when the dooris decoupled from the door slide device.
 30. The vehicle cabin of claim31, wherein the door slide device comprises at least a slide supportunit having at least one track.
 31. The vehicle cabin of claim 32,wherein the at least one slide unit is configured for movement withinthe at least one track.
 32. The vehicle cabin of claim 33, wherein theat least one slide unit is configured to decouple from the slide carrierbracket in response to a jamming of the at least one slide unit in theat least one track.
 33. The vehicle cabin of claim 34, furthercomprising a detachable joint mechanism to detachably mount the at leastone slide unit to the slide carrier bracket.
 34. The vehicle cabin ofclaim 35, wherein the detachable joint mechanism comprises a detachabledetent element and a corresponding detent receiving element configuredto detachably retain the detachable detent element.
 35. The vehiclecabin of claim 36, wherein: the detachable detent element comprises adetent pin, and the detent receiving element comprises a detent holeinto which the detachable detent element is detachably retained in anormal operation state of the door.
 36. The vehicle cabin of claim 31,wherein the at least one auxiliary slide arrangement comprises at leastone guide bar and a retaining element configured for movement along theguide bar.
 37. A seat unit for a vehicle cabin, the seat unitcomprising: a seat; a furniture structure at least partially surroundingthe seat; and a door assembly including: a door movable between aretracted position and at least one deployed position; and a door slidedevice to movably support the door, the door slide device including: aslide carrier bracket coupled to the door, a slide carrier unit havingat least one slide unit coupled to the slide carrier bracket, and atleast one auxiliary slide arrangement to support the door when the dooris decoupled from the door slide device.
 38. The seat unit of claim 39,wherein the door slide device comprises at least a slide support unithaving at least one track.
 39. The seat unit of claim 40, wherein the atleast one slide unit is configured for movement within the at least onetrack.
 40. The seat unit of claim 41, wherein the at least one slideunit is configured to decouple from the slide carrier bracket inresponse to a jamming of the at least one slide unit in the at least onetrack.